<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        * {
            margin: 0;
            padding: 0;
        }

        ul {
            list-style: none;
            display: block;
        }

        li {
            width: 200px;
            height: 100px;
            background-color: rgb(236, 136, 136);
            border: 1px solid #000;
            float: left;
        }
    </style>
</head>

<body>
    <ul>
        <li>1</li>
        <li>2</li>
        <li>3</li>
    </ul>

    <p>hello world</p>
</body>

</html>